i600 died after a downgrade, need help!

[Guest Grommmm]

I upgraded my i600 from wm5 to wm6. It all worked fine. Until my i600 started to refuse to respond to keybord when the keyboard was unlocked. I'd lock the keyboard, and could not unlock it (keyboard not responding), so i had to pull out the battery and restart.

Thats why i decided to downgrade to wm5. Unfortunately, the process didn't go well (upgrade downloaded in phone, and then blocked for 3h). After that i pulled out the battery and can't turn on the device since then.

All i'm seeing is a black turned off screen and can't turn it on.

Is there a way to get the i600 working again? or say buy-buy?